package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.dto.SetmealDto;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.entity.SetmealDish;
import com.itheima.reggie.mapper.SetmealMapper;
import com.itheima.reggie.service.SetmealDishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

@Service
public class SetmealServiceImpl extends ServiceImpl<SetmealMapper, Setmeal> implements SetmealService {

    @Autowired
    private SetmealDishService setmealDishService;



    /**
     * 修改套餐
     * @param setmealDto
     */
    @Override
    @Transactional
    public void updateWith(SetmealDto setmealDto) {
        //更新setmeal表信息
        this.updateById(setmealDto);
        //清理当前菜品中的口味数据setmeal_dish中的delete操作
        LambdaQueryWrapper<SetmealDish> queryWrapper = new LambdaQueryWrapper();
        queryWrapper.eq(SetmealDish::getDishId,setmealDto.getId());
        setmealDishService.remove(queryWrapper);
        //添加当前提交过来的口味数据，setmeal_dish中的insert操作
        List<SetmealDish> setmealDishes = setmealDto.getSetmealDishes();
        setmealDishes =  setmealDishes.stream().map((item)->{
            item.setDishId(setmealDto.getId());
            return item;
        }).collect(Collectors.toList());

        setmealDishService.saveBatch(setmealDishes);
    }



    /**
     * 删除套餐
     * @param ids
     */
    @Override
    @Transactional
    public void deleteWithDish(List<Long> ids) {
       //查询套餐状态，确定是否可以删除
        LambdaQueryWrapper<Setmeal> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.in(Setmeal::getId,ids);
        queryWrapper.eq(Setmeal::getStatus,1);

        int count = this.count(queryWrapper);
        if(count>0){
            //如果不能删除，抛出一个异常
            throw new CustomException("套餐正在使用中，不能删除");
        }
        //如果可以删除，先删除表中的数据
        this.removeByIds(ids);


        //删除套餐和菜品的关联关系
        LambdaQueryWrapper<SetmealDish> queryWrapper1 = new LambdaQueryWrapper<>();
        queryWrapper1.in(SetmealDish::getSetmealId,ids);
        //删除表中的数据关系
        setmealDishService.remove(queryWrapper1);
    }

    /**
     * 新增套餐，同事保存套餐和菜品的关系
     * @param setmealDto
     */
    @Override
    @Transactional
    public void saveWithDish(SetmealDto setmealDto) {
        //保存套餐的基本信息，操作setmeal，执行insert操作
        this.save(setmealDto);

        List<SetmealDish> setmealDishes = setmealDto.getSetmealDishes();
        setmealDishes.stream().map((item)->{
        item.setSetmealId(setmealDto.getId());
        return item;
        }).collect(Collectors.toList());

        //保存套餐和菜品的关联信息，操作setmeal_dish，执行insert操作
        setmealDishService.saveBatch(setmealDishes);

    }
}
